Tesla MODEL S 2012 Owner's Manual page 87

In situations where Auto Lane Change is unable to
operate at optimal performance, or cannot operate due
to inadequate data, the instrument panel displays a
series of warnings. Therefore, when using Auto Lane
Change, always pay attention to the instrument panel
and be prepared to manually steer Model S.
Adjacent Lane Speed
NOTE: Depending on market region, vehicle
configuration, options purchased, and software version,
your vehicle may not be equipped with Adjacent Lane
Speed, or the feature may not operate exactly as
described.
When moving significantly faster than vehicles in
adjacent lanes, Model S automatically reduces the
driving speed. This is especially helpful in heavy traffic
situations or when vehicles are constantly merging into
different lanes. When Model S detects other vehicles
driving significantly slower, the instrument panel
highlights the adjacent lanes with arrows and detected
vehicles in gray, and Model S reduces the driving speed
as appropriate. To temporarily override this feature,
press the accelerator pedal.
WARNING: Never depend on Autopilot to
determine a safe driving speed; you are
responsible for driving safely and according to
traffic laws in your market region.
Stop Light and Stop Sign Warning
NOTE: Depending on market region, vehicle
configuration, options purchased, and software version,
your vehicle may not be equipped with Stop Light and
Stop Sign Warning, or the feature may not operate
exactly as described.
While Autosteer is in use, Model S displays a warning on
the instrument panel and sounds a chime if it detects
that you are likely to run through a red stop light or stop
sign. If this happens, TAKE IMMEDIATE CORRECTIVE
ACTION!
The visual and audible warnings cancel after a few
seconds, or when you press the brake pedal, whichever
comes first.
Stop Light and Stop Sign Warning provides warnings
only. It does not slow down or stop Model S at red traffic
lights, stop signs, road markings, etc. If equipped with
Traffic Light and Stop Sign Control, you can enable this
feature to automatically stop Model S at traffic lights
and stop signs (see Traffic Light and Stop Sign Control
on page 90).
NOTE: Touch Controls > Autopilot > Full Self-Driving
Visualization Preview (if equipped) to display more
details about the roadway and its surroundings, such as
road markings, stop lights, objects (such as trash cans
and poles), etc.
Autopilot
CAUTION: Stop Light and Stop Sign Warning
requires on-board maps to know that a particular
stop light or stop sign exists at a location. In some
cases, map data is inaccurate or outdated and may
not include all stop lights or stop signs. Therefore,
Stop Light and Stop Sign Warning may not detect
all stop lights and stop signs.
WARNING: The Stop Light and Stop Sign Warning
feature does not apply the brakes or decelerate
Model S and may not detect all stop lights and
stop signs. Stop Light and Stop Sign Warning is
designed for guidance purposes only and is not a
substitute for attentive driving and sound
judgment. Keep your eyes on the road when
driving and never depend on Stop Light and Stop
Sign Warning to warn you of a stop light or stop
sign.
WARNING: Stop Light and Stop Sign Warning is
designed to warn you only when approaching a
visible red stop sign, solid red or later portion of a
yellow traffic light. It may not warn you of
intersections with flashing lights and it does not
warn you of yield signs or temporary stop and
yield signs (such as those used in construction
areas). Additionally, Stop Light and Stop Sign
Warning does not warn you of approaching stop
lights or stop signs when you are pressing the
accelerator pedal or brake pedal (which disables
Autosteer).
Limitations
Autosteer and its associated functions are particularly
unlikely to operate as intended when:
• Autosteer is unable to accurately determine lane
markings. For example, lane markings are excessively
worn, have visible previous markings, have been
adjusted due to road construction, are changing
quickly (lanes branching off, crossing over, or
merging), objects or landscape features are casting
strong shadows on the lane markings, or the road
surface contains pavement seams or other high-
contrast lines.
• Visibility is poor (heavy rain, snow, fog, etc.) or
weather conditions are interfering with sensor
operation.
• A camera(s) or sensor(s) is obstructed, covered, or
damaged.
• Driving on hills.
• Approaching a toll booth.
• Driving on a road that has sharp curves or is
excessively rough.
• Bright light (such as direct sunlight) is interfering
with the view of the camera(s).
• The sensors are affected by other electrical
equipment or devices that generate ultrasonic waves.
Autosteer
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